CN100490295C - Inverter and inverter driving method for enabling soft start of a load - Google Patents
Inverter and inverter driving method for enabling soft start of a load Download PDFInfo
- Publication number
- CN100490295C CN100490295C CNB2005101134057A CN200510113405A CN100490295C CN 100490295 C CN100490295 C CN 100490295C CN B2005101134057 A CNB2005101134057 A CN B2005101134057A CN 200510113405 A CN200510113405 A CN 200510113405A CN 100490295 C CN100490295 C CN 100490295C
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- China
- Prior art keywords
- inverter
- control unit
- input
- load
- output voltage
- Prior art date
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/505—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/515—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/525—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform or frequency
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/382—Controlling the intensity of light during the transitional start-up phase
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S323/00—Electricity: power supply or regulation systems
- Y10S323/901—Starting circuits
Abstract
An inverter and inverter driving method for enabling slow start of a load by slowly increasing the lamp current within a range less than a predetermined maximum level thereby preventing the inverter from operating in a wrong way is disclosed. The inverter according to the present invention includes a transformer for converting a DC input voltage into an AC output voltage, an inverter control unit for controlling a level of the AC output voltage from the transformer in response to a feedback current from a load driven by the AC output voltage, and a kick-off control unit for adjusting the feedback current during a kick-off period for starting the load.
Description
The application requires to merge it in full as a reference in the rights and interests of the korean patent application No.10-2004-0078665 of application on October 4th, 2004 at this.
Technical field
The present invention relates to a kind of inverter and inverter driving method, particularly a kind ofly be used to make inverter and the inverter driving method of load soft start to prevent that inverter from operating in the mode of mistake.
Background technology
Inverter is a kind of voltage generator that exchanges AC voltage that the direct current dc voltage is converted to.Inverter is widely used for comprising in washing machine and the household electrical appliance such as the display device of monitor and TV.Especially, inverter transformer is widely used as for the high pressure generator of connecting and cutting out discharge tube, and this discharge tube is widely used in inverter frame, fluorescence stabilizer, monitor, notebook or the like.
An inverter driving circuit is essential, because inverter drives via external control method such as pulse-width modulation (PWM).
Below, explain the inverter of prior art with reference to the accompanying drawings.
Fig. 1 is the circuit diagram that illustrates the inverter of prior art, and this inverter is connected to load, particularly, is used for the cold-cathode fluorescence lamp (CCFL) of TFT-LCD.
As shown in Figure 1, the inverter of prior art comprises inverter driving circuit 10 and transformer 20.This inverter driving circuit 10 comprises inverter control unit 11, transistor Q1 and resistance R 1.The direct voltage that this transformer will provide after power supply controlled device (not shown) is connected is converted to the alternating voltage that offers lamp 30.This lamp 30 comes work by the alternating voltage that is provided by this transformer 20 is provided.Lamp current is used as feedback and offers this inverter control unit 11.This inverter control unit 11 comes oxide-semiconductor control transistors Q1 according to the level from this feedback lamp current of lamp 30, thus the output voltage of control transformer 20.
Hereinafter, this inverter driving circuit 10 is explained according to its operation.
At first, this inverter control unit 11 provides pulse signal with predetermined duty cycle grid to this transistor Q1.The brightness of this lamp 30 can recently be controlled by the duty that changes this pulse signal.When this transistor Q1 was connected by this pulse signal of the grid by offering transistor Q1, direct voltage B+ was inputed to this transformer 20 with certain time interval.This transformer 20 is converted to alternating voltage according to the number of its first and second coil with this direct voltage B+.Be used as feedback from the alternating voltage of this transformer 20 outputs and offer this inverter control unit 11.Subsequently, this inverter control unit 11 changes the pulse duration of the pulse signal of the grid that will offer this transistor Q1, thereby transistorized output voltage is controlled in the predetermined scope.
With reference to figure 2, when this inverter is switched on, need beginning (kick-off) stage to remove start light, the maximum level of lamp current and modulating voltage should be provided for lamp during this period.For this reason, the resistance that this inverter control unit 11 is connected in its resistance R 1 by change changes the frequency of this pulse signal, makes that the high output voltage of this transformer 20 can offer lamp 30 during this incipient stage.Normally, when for the common action need 600-700 of this lamp 30
In the time of V, during this incipient stage, need 1600-1700V.
In a word, during this incipient stage, be provided for this lamp 30 from the high output voltage of this transformer 20, be used to start this lamp 30, the feedback lamp current from this lamp 30 is provided for inverter control unit 11 then.Based on this feedback lamp current from this lamp 30, these inverter control unit 11 controls this resistance R 1 and this transistor Q1 are to provide the voltage and current with appropriate level to this lamp 30.
But the inverter of prior art has following problem.
At first, because this output voltage from transformer 20 is very high during the incipient stage, this lamp current levels also is enhanced.Because the lamp current levels of this raising, the output voltage of this transformer 20 can be enhanced, and departs from predetermined scope.Therefore, when lamp 30 will be opened, this lamp 30 may be closed.
Secondly, during the incipient stage, very the voltage of high level offers lamp 30, and the DC input voltage B+ of this transformer 20 can have less than the needed level of high level AC output voltage that offers this lamp 30.It also may cause the misoperation and lamp 30 unnecessary the closing of this inverter.
Summary of the invention
In view of the above, the present invention proposes a kind of inverter and inverter driving method, it has eliminated one or more problems that cause owing to the restriction and the shortcoming of prior art basically.
An object of the present invention is to provide a kind of inverter and the inverter driving method of load soft start that be used to make to prevent that this inverter from operating in the mode of mistake.
To be partly articulated additional advantages of the present invention, purpose and characteristics in the following description, for this area those skilled in the art, in check during following content or can learn from the practice of the present invention that additional advantages of the present invention, purpose and characteristics will partly become apparent.By specifically noted structure in specification and claim and accompanying drawing, can realize and obtain purpose of the present invention and other advantage.
In order to realize the advantage of these purposes and other, and according to purpose of the present invention, as implementing herein and broadly described, according to a kind of inverter of the present invention, it comprises: transformer is used for the DC input voltage is converted to the AC output voltage; Inverter control unit is used to respond the feedback current from AC load that output voltage drives, and control is from the level of the AC output voltage of this transformer; With the beginning control unit, be used for during incipient stage, regulating feedback current for this load of starting.
Preferably, the beginning control unit is regulated this feedback current by the electric current that it is added a predetermined level.
Preferably, the incipient stage is 0.1-1 second.
Preferably, inverter further comprises: the error amplifier with anti-phase (-) input and homophase (+) input, this error amplifier will compare via anti-phase (-) input feedback current that receives and first reference voltage signal that receives via homophase (+) input, and export first comparison signal; With comparator with anti-phase (-) input and homophase (+) input, this comparator will compare via homophase (+) input terminal first comparison signal that receives and second reference voltage signal that receives via anti-phase (-) input, and export second comparison signal.
Further preferably, during the incipient stage, the beginning control unit offers the predetermined current level anti-phase (-) input of this error amplifier.
Further preferably, the beginning control unit comprise be used to control input predetermined current level give this error amplifier anti-phase (-) input transistor and be used for controlling the logical circuit of these transistor opening and closing for this transistorized grid by output output control signal.
Even further preferably, the beginning control unit further comprises: the reference saw-tooth waveform generator is used to produce the reference saw-tooth waveform signal; And compensator, be used for compensating distortion from the output control signal of this logical circuit based on this reference saw-tooth waveform signal.
Preferably, inverter control unit is controlled the level from the AC output voltage of transformer by this way: during the incipient stage, increase the electric current that will offer load lentamente in the scope of predetermined maximum level.
Preferably, this inverter further comprises the transistor that is connected to this transformer, and this transistor determines to offer the DC input voltage of this transformer under the control of inverter control unit.
Further preferably, this inverter control unit produces the pulse signal that offers this transistorized grid.
Further preferably, this inverter control unit is controlled level from the AC output voltage of transformer by the frequency that changes this pulse signal.
Even further preferably, the impedance that this inverter control unit is connected in its resistance by change changes the frequency of this pulse signal.
Preferably, load is a cold-cathode fluorescence lamp backlight (CCFL) as TFT-LCD.
In another aspect of this invention, inverter driving method comprises the DC input voltage is converted to the AC output voltage; During being used for the incipient stage of starting duty, regulate the feedback current of the load that is driven from the AC output voltage; And the level that comes the AC output voltage of control transformation according to the feedback current of regulating.
Preferably, regulate feedback current and comprise that electric current with predetermined level is added to this feedback current from this load.
Preferably, this incipient stage is 0.1-1 second.
Preferably, the level of the AC output voltage of control transformation comprises: during the incipient stage, increase the electric current that offers load lentamente in less than the scope of predetermined maximum level.
Preferably, the level of the AC output voltage of control transformation is carried out by using pulse-width modulation (PWM) method.
Should be understood that general introduction and following detailed description above of the present invention is exemplary and illustrative, and be intended to as the further explanation of the invention provides of claim.
Description of drawings
The application's book is combined with accompanying drawing providing further understanding of the present invention, and accompanying drawing constitutes the part of the application's book.Accompanying drawing is for example understood embodiments of the invention, and works to explain the principle of the invention with specification.In the accompanying drawings:
Fig. 1 is the circuit diagram that illustrates the prior art inverter;
Fig. 2 is the figure that is used to explain the operation waveform of prior art inverter;
Fig. 3 is the circuit diagram that illustrates according to inverter of the present invention; With
Fig. 4 is the figure that is used to explain according to the operation waveform of inverter of the present invention.
Embodiment
To at length introduce the preferred embodiments of the present invention now, its example illustrates in the accompanying drawings.In any possible situation, in whole accompanying drawings, identical Reference numeral will be represented same or analogous part.
Fig. 3 is the circuit diagram that illustrates according to inverter of the present invention, and Fig. 4 is the figure that is used to explain according to the operation waveform of inverter of the present invention.
With reference to figure 3, comprise according to this inverter of the present invention: transformer 200, it has first coil that receives the DC input voltage and second coil of AC output voltage to the lamp 300 that is connected in it is provided; With the inverter driving circuit 100 of first coil that is connected to this transformer 200, be used for according to the AC output voltage of controlling from the feedback current of lamp 300 from second coil of this transformer 200.
Inverter driving circuit 100 of the present invention comprises transistor Q1, error amplifier (EA) 130, comparator (COMP) 120, inverter control unit 110 and beginning control unit.
Transistor Q1 determines the supply to the DC input voltage of first coil of transformer 200 under the control of this inverter control unit 110.
Error amplifier 130 receives the feedback current and first reference voltage signal from lamp 300 respectively by anti-phase (-) input and homophase (+) input, with this feedback current and this first reference voltage relatively, and exports first comparison signal.
Comparator 120 receives first comparison signal and second reference voltage signal from error amplifier 130 respectively by homophase (+) input and anti-phase (-) input, with first comparison signal and second reference voltage relatively, and exports second comparison signal.
Second comparison signal that inverter control unit 110 receives from this comparator 120, and control this transistor Q1, controlling AC output voltage based on this second comparison signal, thereby drive lamp 300 and control the brightness of this lamp 300 from transformer 200 second coils.
During the required incipient stage of start light 300, beginning control unit 140 adds the electric current of predetermined level to from lamp 300 this feedback current.This begin control unit 140 comprise the electric current that is used to control the input predetermined level give error amplifier 130 anti-phase (-) input terminal transistor Q2 and be used to control the logical circuit 141 of this transistor Q2.
According to the preferred embodiments of the present invention, be input to compensator 143 from the output signal of this logical circuit 141 of control this transistor Q2.Based on the reference saw-tooth waveform signal that is produced by reference saw-tooth waveform generator 142, compensator 143 compensation are from any distortion of the output signal of this logical circuit 141.
According to the preferred embodiments of the present invention, the lamp 300 that is used as load is usually as TFT-LCD cold-cathode fluorescence lamp (CCFL) backlight.But inverter of the present invention can be applied to other electric equipment, such as fluorescent lamp, washing machine or the like.
Be detailed explanation below according to inverter operation of the present invention.
When the control signal that drives lamp 300 is provided, this inverter control unit 110 provides the pulse signal of a certain duty ratio to make this transistor Q1 conducting by the grid of giving transistor Q1, thereby makes this DC output voltage B+ offer first coil of this transformer 200.Response is by the DC input voltage B+ of this first coil, and this transformer 200 sends the AC output voltage to lamp 300 via its second coil, drives lamp 300 thus.The lamp current that is used to drive this lamp 300 is used as anti-phase (-) input that feedback current inputs to this error amplifier 130.This error amplifier 130 will be compared with the reference voltage signal of importing via its homophase (+) input from the feedback current of lamp 300, and export first comparison signal.This first comparison signal is transfused to homophase (+) input to comparator 120.Then, this comparator 120 compares first comparison signal and the reference voltage signal of importing via its anti-phase (-) input, and exports second comparison signal.This second comparison signal is imported into inverter control unit 110.By changing the resistance of resistance R 1, change will offer the duty ratio of this pulse signal of transistor Q1 grid to this inverter control unit 110 based on second comparison signal.By this way, this inverter control unit 110 will be controlled within the predetermined scope from the level of this AC output voltage of second coil of this transformer 200 output.
As shown in Figure 4, the incipient stage needs for this lamp 300 of starting, high voltage should be offered lamp 300 during it.Suppose that the voltage of 600-700V is provided for the operation of the routine of this lamp 300, be used for its initial start 1600-1700V in addition so.
If the initial demonstration that the incipient stage less than 0.1 second, then illustrates is as flashing.On the other hand, if should the incipient stage greater than 1 second, the user can feel that display lights lentamente, it also is undesirable.Therefore, preferably, this incipient stage is 0.1-1 second.
During the incipient stage, inverter control unit 110 changes the duty ratio of this pulse signal by the resistance that changes resistance R 1, thereby increases the AC output voltage that will offer lamp 300.Simultaneously, beginning control unit 140 adds to the feedback current that will be input to anti-phase (-) input of error amplifier 130 from lamp 300 with the electric current of predetermined level.
Explain that in more detail during this incipient stage, logical circuit 141 disconnects transistor Q2, so that the electric current of this predetermined level offers anti-phase (-) input of this error amplifier 130.According to the preferred embodiments of the present invention, be to compensate based on reference saw-tooth waveform signal from reference saw-tooth waveform generator 142 by compensator 143 from the distortion of the output control signal of this logical circuit 141.
By this way, inverter control unit 110 recognizes overcurrent and has been applied to this lamp 300 because recently from the actual feedback currents of this lamp 300 more the electric current of high level be imported into error amplifier 130.In view of the above, this inverter control unit 110 is controlled the AC output voltage from this transformer 200 by changing the duty ratio of this pulse signal that will offer transistor Q1 grid, makes the electric current of appropriate level can be provided for lamp 300 with a kind of like this method.Thereby inverter control unit increases lamp current lentamente in the scope less than predetermined maximum level.
As mentioned above, be used to make the lamp soft start, operate in the mode of mistake to prevent inverter according to this inverter of the present invention and inverter driving method.
Can make various modifications and variations in the present invention and not break away from spirit of the present invention or scope, this it will be apparent to those skilled in the art that.Therefore, this invention is intended to cover the modifications and variations of the present invention that enter within appended claim and its equivalent scope.
Claims (17)
1. inverter that makes the load soft start, this inverter comprises:
Transformer is used for DC input voitage is converted to ac output voltage;
Inverter control unit is used to respond the feedback current of the load that drives from ac output voltage, and control is from the level of the ac output voltage of this transformer;
The beginning control unit was used for regulating this feedback current by the electric current that feedback current is added predetermined level during the incipient stage of this load of starting; With
Be connected to the transistor of this transformer, this transistor is determined the supply to the DC input voltage of this transformer under the control of inverter control unit.
2. inverter as claimed in claim 1, wherein this incipient stage is 0.1-1 second.
3. inverter as claimed in claim 1 further comprises:
Error amplifier with anti-phase (-) input and homophase (+) input, this error amplifier will be compared with first reference voltage signal that receives via homophase (+) input via the feedback current that anti-phase (-) input receives, and export first comparison signal; With
Comparator with anti-phase (-) input and homophase (+) input, this comparator will be compared with second reference voltage signal that receives via anti-phase (-) input via first comparison signal that homophase (+) input receives, and export second comparison signal to described inverter control unit.
4. inverter as claimed in claim 3, wherein during the incipient stage, the beginning control unit offers the electric current of predetermined level anti-phase (-) input of this error amplifier.
5. inverter as claimed in claim 4, wherein this beginning control unit comprise the electric current that is used to control the input predetermined level give error amplifier anti-phase (-) input transistor and be used for outputting a control signal to the logical circuit that this transistorized grid is controlled these transistor opening and closing by output.
6. inverter as claimed in claim 5, wherein this beginning control unit further comprises: the reference saw-tooth waveform generator is used to produce the reference saw-tooth waveform signal; And compensator, be used for based on the distortion of this reference saw-tooth waveform signal compensation from the output control signal of this logical circuit.
7. inverter as claimed in claim 1, wherein inverter control unit is controlled the level from the ac output voltage of transformer by this way, make that during the incipient stage electric current that offers load increases lentamente in less than the scope of predetermined maximum level.
8. inverter as claimed in claim 1, wherein this inverter control unit produces the pulse signal that will offer this transistorized grid.
9. inverter as claimed in claim 8, wherein this inverter control unit is controlled level from the ac output voltage of transformer by the frequency that changes pulse signal.
10. inverter as claimed in claim 9, wherein the impedance that is connected to the resistance of described inverter control unit by change of this inverter control unit changes the frequency of this pulse signal.
11. inverter as claimed in claim 1, wherein load is the cold-cathode fluorescence lamp backlight (CCFL) as TFT-LCD.
12. an inverter driving method that makes the load soft start, this method comprises:
DC input voitage is converted to ac output voltage;
During the incipient stage of this load of starting, regulate the feedback current of the load that free ac output voltage driven by the electric current that feedback current is added predetermined level; With
Come the level of the ac output voltage of control transformation according to the feedback current of regulating.
13. inverter driving method as claimed in claim 12, the method for wherein regulating feedback current comprises that the electric current with predetermined level adds to the feedback current from this load.
14. inverter driving method as claimed in claim 12, wherein this incipient stage is 0.1-1 second.
15. inverter driving method as claimed in claim 12, wherein the level of the ac output voltage of control transformation comprises: during the incipient stage, increase the electric current that offers this load lentamente in less than the scope of predetermined maximum level.
16. inverter driving method as claimed in claim 12, wherein the level of the ac output voltage of control transformation is realized by using pulse-width modulation (PWM) method.
17. inverter driving method as claimed in claim 12, wherein this load is the cold-cathode fluorescence lamp backlight (CCFL) as TFT-LCD.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20040078665 | 2004-10-04 | ||
| KR1020040078665 | 2004-10-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1777009A CN1777009A (en) | 2006-05-24 |
| CN100490295C true CN100490295C (en) | 2009-05-20 |
Family
ID=36125344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101134057A Expired - Fee Related CN100490295C (en) | 2004-10-04 | 2005-10-08 | Inverter and inverter driving method for enabling soft start of a load |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7408792B2 (en) |
| EP (1) | EP1643623A3 (en) |
| KR (1) | KR100662469B1 (en) |
| CN (1) | CN100490295C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283430A (en) * | 2013-07-05 | 2015-01-14 | 立锜科技股份有限公司 | Soft start switching power supply conversion device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008159545A (en) * | 2006-12-26 | 2008-07-10 | Sanken Electric Co Ltd | Cold-cathode tube fluorescent lamp inverter device |
| US8299768B2 (en) * | 2008-11-20 | 2012-10-30 | Intersil Americas Inc. | PWM voltage converter with redundancy and feedback adjustment |
| CN103066838B (en) * | 2013-02-05 | 2014-11-12 | 深圳市华星光电技术有限公司 | Power system and control method thereof |
| TWI611644B (en) * | 2016-12-26 | 2018-01-11 | 亞源科技股份有限公司 | Overcurrent protection circuit |
| CN108258893B (en) * | 2016-12-29 | 2020-10-30 | 亚瑞源科技（深圳）有限公司 | Overcurrent protection circuit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4104715A (en) * | 1977-03-10 | 1978-08-01 | Acme Electric Corp. | Alternating current to alternating current converter apparatus |
| JP2778554B2 (en) * | 1995-10-12 | 1998-07-23 | 日本電気株式会社 | Piezo transformer drive circuit |
| JP3063755B1 (en) * | 1999-04-08 | 2000-07-12 | 株式会社村田製作所 | Piezoelectric transformer inverter |
| US6259615B1 (en) * | 1999-07-22 | 2001-07-10 | O2 Micro International Limited | High-efficiency adaptive DC/AC converter |
| JP4267883B2 (en) * | 2001-09-21 | 2009-05-27 | ミネベア株式会社 | LCD display unit |
| US6853565B1 (en) * | 2003-05-23 | 2005-02-08 | Linear Technology Corporation | Voltage overshoot reduction circuits |
-
2005
- 2005-09-30 KR KR1020050092372A patent/KR100662469B1/en not_active IP Right Cessation
- 2005-10-04 EP EP05256195A patent/EP1643623A3/en not_active Withdrawn
- 2005-10-04 US US11/241,994 patent/US7408792B2/en not_active Expired - Fee Related
- 2005-10-08 CN CNB2005101134057A patent/CN100490295C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283430A (en) * | 2013-07-05 | 2015-01-14 | 立锜科技股份有限公司 | Soft start switching power supply conversion device |
| CN104283430B (en) * | 2013-07-05 | 2016-12-28 | 立锜科技股份有限公司 | Soft start switching power supply conversion device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100662469B1 (en) | 2007-01-02 |
| US20060072351A1 (en) | 2006-04-06 |
| EP1643623A2 (en) | 2006-04-05 |
| CN1777009A (en) | 2006-05-24 |
| US7408792B2 (en) | 2008-08-05 |
| KR20060051973A (en) | 2006-05-19 |
| EP1643623A3 (en) | 2009-02-18 |
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